Chimney-cap



NOMOdeH Wi. H. GARDNER.

GHIMNBY GAP.

No. 439,816. Patented Nov. 4, 1890.

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UNITED STATES PATENT OFFICE.

lVILLIAM HOVARD GARDINER, OF CAMDEN, MAINE.

CHlMNEY-CAP.

SPECIFICATION forming part of Letters Patent No. 439,816, dated November 4, 1890.

Application filed March 15 1889. Serial No. 303,433. (No model.)

To alo' whom t may concern:

Be it known thatLWrLLIAM HOWARD GAR- DINER, of Camden, in t-he county of Knox and State of Maine, have invented a new and Improved Chimney-Cap, of which the following ing is a full, clear, and exact description.

The object of the invention is to provide a new and improved chimney-cap on top to a yentilatingfshaft which is simple and durable 1n construction, very effective in operation, and permits a free escape of the smoke and gases from the chimney or air-shaft, no matter in which direction the wind strikes the cap.

.The invention consists of a cone hung on a plvot above the chimney-pipe and supporting a mantle surrounding the said chimney-pipe.

The invention also consists of certain parts and details and combinations of the same, as will be hereinafter fully described, and then pointed out in the claim.

Reference is to be had to the accompanying drawings, forminga part of this specification, in which similar letters of reference indicate corresponding parts in both the figures.

Figure l is a sectional side elevation of the improvement as applied on the line x of Fig. 2, and Fig. 2 is a sectional plan view of the same on the line y y of Fig. l.

In the upper end of the chimney or airshaft A is secured by suitable means a pipe B, carrying in its extreme upper end a crosspiece or bridge C, supporting in the center an upwardly-extending rod D, provided near its upper end with av collar E,on which rests the center of a cone F, extending over the upper end of the chimney-pipe B. The cone F is provided with an enlarged central aperture, through which passes the upper end of the rod D, and a nut D on the upper end of the said rod prevents the cone F from becoming detached from the rod D. The cone F is free to swing in any direction, the center being the rod D. The rod D may be attached to the pipe B in any other suitable manner.

From the cone F extend downward a number of braces G, supporting at their lower ends a mantle H, surrounding the pipe B directly above the chimney A. The upper end of the mantle H does not extend clear to the upper end of the pipe B, and the lower edge of the cone F extends a short distance over the upper end of the said pipe B. From the lower end of the mantle H project outward a number of braces I, supporting a ring J, adapted toengage the sides of the capping-stone K, held in the usual manner on the upper end of the chimney or air-shaft A.

The mantle H presents such alarge surface that the device will readily respond to the force of the wind.

The inner surface of mantle H is a distance from the outer surface of pipe B, and consequently when the wind blows and the cone, mantle, and ring are tipped an upward aircurrent is produced through this space between the inner surface of the mantle and outer surface of the pipe, which upward currentaids in expelling the smoke, die., through the space between the braces, upper end of the mantle, and lower edge of the cone. Vere the cone only used the smoke and gases coming from the pipeBwould in some conditions of the atmosphere tend to set back under the cone and cause the lire-place or stove connected with the chimney to smoke, and it is therefore important to form the air-passage between the inner surface of the mantle and the outer surface of the pipe. The cap K is in fact a part of the chimney A, and being of stone, brick, or the like gives forth but a dull sound when struck by the ring J.

It will be seen that as the mantle H is rigidly connected with the cone F and the ring J is rigidly connected with the mantle H both the mantle and the ring J will swing with the cone F, the rod D being the pivot. Nowwhen the wind strikes in any direction against the cone F and mantle ll the latter swings inward at the point of striking until the ringJ abuts against the capping-stone K. This inward movement or direction of the ring throws the cone F, the mantle Il, and the ring J into an angular position7 asis shown in dotted lines in Fig. l, so that thelowermost end of the cone F protects the chimney-pipe BV on one side, almost closing the same and opening the other side, so that the smoke and gases can easily escape from the pipe B in the same direction as that in which the wind blows, or leeward side.

When the wind strikes from above, it strikes against the top of the cone F and obliquely on the mantle, so that they are again thrown into an inclined position, causing the wind IOO to pass over the mantle H. When the cone F and the mantle H arefthrown in an inclined position by the action of the wind,a draft is created on the opposite side by the wind, so that the free escape of the smoke and gases from the pipe B takes place. The ring J is added, so as to limit the movement of the mantle H and the cone F, at the same time preventing the lower edge of the mantle H from striking against the metal pipe B, and thus producing the noise which would otherwise be produced in a strong wind.

I am aware of Letters Patent No. 22,122, to Douglass. November 23, 1858; No.128,514, to Turner, July 2, '1872,and No. 141,107, to Boyd July 22, 1873, and disclaim all that is shown in them.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- The herein-described combination of chimney A, pipe B, mounted thereon and extending above chimney A, cross-piece C, secured to pipe B,uprght D,supported by cross-piece C,cone F, loosely mounted on upright D,braces G, projecting downwardly from cone F, mantle H, secured to braces G, surrounding pipe B,with its inner surface at a distance from the outer surface of pipe B and provided with a ring J, projecting below the top of chimney A, the braces G, keeping the upper end of mantle H at a distance from the lower edge of cone F to produce a smoke-escape, the space between mantle H and pipe B forming an air-passage for an upward draft to aid in expelling smoke through the space between the lower edge of the cone and the upper end of the mantle, and the ring J, engaging the side of the chimneyAwhen the cone is tipped to the limit of its range of movement, all substantially as and for the purpose set forth.

WM. HOWARD GARDINER.

lVitnesses:

J. H. MONTGOMERY, F. H. WILBUR. 

